/Engine/Source/Runtime/MessagingCommon/Public/MessageEndpoint.h
Notifies the sender of errors.
virtual void NotifyMessageError ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IMessageContext](API\Runtime\Messaging\IMessageContext), ESPMode::ThreadSafe > & Context, const [FString](API\Runtime\Core\Containers\FString) & Error )